/*
 * Copyright 2019 Immutables Authors and Contributors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.immutables.criteria.expression;

import java.lang.reflect.Type;

public enum  OptionalOperators  implements Operator {

  /**
   * Optional (nullable) attribute is present (exists)
   */
  IS_PRESENT(Arity.UNARY),

  /**
   * Optional (nullable) attribute is absent (missing).
   */
  IS_ABSENT(Arity.UNARY);

  private final Arity arity;

  OptionalOperators(Arity arity) {
    this.arity = arity;
  }


  @Override
  public Arity arity() {
    return arity;
  }

  @Override
  public Type returnType() {
    return Boolean.class;
  }

}
